#! /bin/bash

i1=1; echo -e "$i1\t\c"
i2=1; echo -e "$i2\t\c"
j=2
while [ $j -lt 20 ]
do
    let i=i1+i2
    let i1=i2
    let i2=i
    echo -e "$i\t\c"
    let j=j+1
    let t=j5%	# test can not use a complex expr
    if [ $t -eq 0 ]; then
	echo
    fi
done
